package edu.API基础String.String;

import java.util.Scanner;

public class 案例_统计字符次数 {
    public static void main(String[] args) {
        /*
        键盘录入一个字符串，统计该字符串中大写字母字符，小写字母字符，数字字符出现的次数（不考率其他字符）
         */
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入字符串：");
        String s = sc.nextLine();

        //统计变量
        int bigCount = 0;
        int smallCount = 0;
        int numCount = 0;
        //遍历
        char[] chars = s.toCharArray();
        for (int i = 0; i < chars.length; i++) {
            char c = chars[i];
            if (c >= 'A' && c <= 'Z') {
                bigCount++;
            } else if (c >= 'a' && c <= 'z') {
                smallCount++;
            } else if (c >= '0' && c <= '9') {
                numCount++;
            }
        }
        System.out.println("大写"+bigCount);
        System.out.println("小写"+smallCount);
        System.out.println("数字"+numCount);
    }
}
